Process air conditioning and systems
By introducing a secondary return air valve and temperature and humidity sensors into the process air conditioning system, the stratified utilization and precise control of the return air volume are achieved, solving the problems of heat and cold offsetting and high energy consumption, and improving the system's energy utilization rate and energy-saving effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA TOBACCO GUANGXI IND
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional air conditioning systems suffer from severe heat and cold offsetting, leading to increased energy consumption, low energy efficiency, and the need for large amounts of steam reheating, resulting in high system energy consumption.
A secondary return air valve is used to control the return air volume in a stratified manner based on temperature and humidity. Combined with temperature and humidity sensors and a PLC control unit, the opening of the secondary return air valve is automatically adjusted to achieve precise control and stratified utilization of the return air.
It significantly improves the system's energy efficiency, reduces the consumption of chilled water and steam, meets the temperature and humidity requirements of different environments, and reduces operating costs.
Smart Images
Figure CN224534404U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of air conditioning technology, and in particular to a process air conditioning system. Background Technology
[0002] Process air conditioning refers to air conditioning units that provide a specific indoor environment for research, production, medical, or testing processes. In industrial production, process air conditioning typically requires strict control of indoor temperature and humidity to meet the demands of the production process. Traditional control methods require all return air to pass through a surface cooler for cooling, resulting in a significant drop in air temperature. However, considering the required supply air temperature and humidity, steam heating and humidification are necessary before the supply air can be powered by a fan to deliver it to various process units. However, this system suffers from the following problems: severe heat and cold offsetting, leading to increased energy consumption; inability to fully utilize the temperature, humidity, and heat of the return air, resulting in low energy efficiency; and the need for large amounts of steam for reheating, further increasing energy consumption. Utility Model Content
[0003] In view of this, embodiments of this application provide a process air conditioning system that can effectively solve the problem of high steam consumption.
[0004] In a first aspect, this application provides a process air conditioner, comprising: a wind control device, a temperature and humidity control device, an air supply module, and a PLC control unit arranged sequentially;
[0005] The temperature and humidity control device is equipped with a secondary return air valve, which is used to control the return air volume by stratifying the temperature and humidity.
[0006] The air control device is equipped with a temperature and humidity sensor to monitor the temperature and humidity of the return air in real time.
[0007] The air supply module is used for air supply.
[0008] In some embodiments, the wind control device includes: a fresh air mixing adjustment module and a return air module;
[0009] The temperature and humidity sensor is installed on the return air module.
[0010] In some embodiments, a filtration device is also included, which is disposed between the air control device and the temperature and humidity control device.
[0011] In some embodiments, the filtration device includes: a primary filtration module, a secondary filtration module, and a tertiary filtration module.
[0012] In some embodiments, the temperature and humidity control device includes: a surface cooling module, a steam heating module, a condensate recycling heating module, and a humidification module;
[0013] The secondary return air valve is installed on the surface cooling module.
[0014] In some embodiments, the secondary return air valve includes a primary return air channel and a secondary return air channel. The primary return air channel is connected to the new mixed air adjustment module of the air control device, and the secondary return air channel is connected to the air supply module, the steam heating module, or the condensate recycling heating module.
[0015] In some embodiments, the PLC control unit is used to automatically adjust the opening degree of the secondary return air valve.
[0016] In some embodiments, the process air conditioner further includes a condensate recovery device connected in parallel with the steam heating module for recycling high-temperature steam condensate.
[0017] In some embodiments, the secondary return air duct is connected to the air supply module.
[0018] Secondly, this application also provides a process air conditioning system, which is equipped with the process air conditioner and air conditioning controller as described above.
[0019] The embodiments of the application have the following beneficial effects:
[0020] This utility model proposes a process air conditioner that utilizes a secondary return air valve to stratify and utilize the return air volume, making full use of the temperature, humidity, and heat of the return air, reducing the consumption of chilled water and steam, and significantly improving the system's energy efficiency. It automatically adjusts the opening of the secondary return air valve to achieve precise control of the return air temperature and humidity, meeting the temperature and humidity requirements of different environments. It further improves the system's thermal energy utilization rate, reduces operating costs, and has significant advantages in energy saving. Attached Figure Description
[0021] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 A schematic diagram of a process air conditioning structure according to an embodiment of this application is shown;
[0023] Figure 2 A schematic diagram of the risk control device structure according to an embodiment of this application is shown;
[0024] Figure 3 A schematic diagram of the filtering device structure according to an embodiment of this application is shown;
[0025] Figure 4A schematic diagram of the temperature control device according to an embodiment of this application is shown;
[0026] Figure 5 A schematic diagram of a process air conditioning system according to an embodiment of this application is shown.
[0027] Explanation of key component symbols:
[0028] Air control device-100, filtration device-200, temperature and humidity control device-300, air supply module-400, PLC control unit-500, fresh air mixing adjustment module-110, return air module-120, primary filtration module-210, secondary filtration module-220, tertiary filtration module-230, secondary return air valve-310, surface cooling module-320, steam heating module-330, condensate recycling heating module-340, humidification module-350. Detailed Implementation
[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0030] In the description of this utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "top surface", "bottom surface", "inner", "outer", "inner side", "outer side", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.
[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.
[0033] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of this application pertain. Terms (such as those defined in commonly used dictionaries) shall be interpreted as having the same meaning as in their contextual meaning in the relevant technical field and shall not be construed as having an idealized or overly formal meaning, unless clearly defined in the various embodiments of this application.
[0034] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0035] Process air conditioning typically requires strict control of indoor temperature and humidity to meet the requirements of production processes. This application provides a process air conditioning system, comprising: a wind control device, a temperature and humidity control device, an air supply module, and a PLC control unit arranged sequentially; the temperature and humidity control device is equipped with a secondary return air valve, which is used to control the return air volume by stratified utilization of temperature and humidity; the wind control device is equipped with a temperature and humidity sensor for real-time monitoring of the temperature and humidity of the return air; and the air supply module is used for air supply.
[0036] The following describes the air conditioning process using specific examples.
[0037] Figure 1 The structure of a process air conditioner according to an embodiment of this application is shown. The process air conditioner includes: an air control device 100, a filter device 200, a temperature and humidity control device 300, an air supply module 400, and a PLC control unit 500.
[0038] The air control device 100 is mainly used for air supply operation, the filter device 200 is used to filter the supplied air, the temperature and humidity control device 300 is used to control the temperature and humidity, the air supply module 400 is used for air supply operation, and the PLC control unit 500 is used to control the overall process air conditioning operation.
[0039] like Figure 1As shown, when the air conditioner is working, air enters the air conditioner from the air control device 100 on the left, and then passes through the filter device 200, temperature and humidity control device 300 and air supply module 400 to the right in sequence, and finally is delivered out by the air supply module to complete the cooling work.
[0040] The temperature and humidity control device includes a secondary return air valve 310, which is used to control the return air volume by stratifying the temperature and humidity.
[0041] The air control device is equipped with temperature and humidity sensors to monitor the temperature and humidity of the return air in real time.
[0042] The PLC control unit 500 controls the opening of the secondary return air valve 310 based on the data fed back by the temperature and humidity sensor, thereby performing stratified utilization control of the return air volume based on temperature and humidity.
[0043] Among them, such as Figure 2 As shown, the air control device 100 in this embodiment includes: a fresh air mixing adjustment module 110 and a return air module 120. The fresh air mixing adjustment module 110 is used to adjust the temperature and humidity of the fresh air and mix the fresh air and return air.
[0044] Return air module 120 is used to collect indoor return air.
[0045] The temperature and humidity sensor is installed on the return air module 120. At this location, the temperature and humidity of the most realistic natural wind can be detected. The temperature and humidity detected here are basically consistent with the external environment. The PLC control unit acquires this data and then controls the secondary return air valve 310 to perform the corresponding operation.
[0046] like Figure 3 The diagram shows the structure of the filter device 200, which includes three sub-filter modules: a primary filter module 210, a secondary filter module 220, and a tertiary filter module 230. Through the multiple filtration of the three filter modules, it is possible to ensure that suspended particles and other impurities in the air are filtered out, thus ensuring the quality of the delivered air.
[0047] like Figure 4 The diagram shown is a structural schematic of a temperature and humidity control device 300, which includes a surface cooling module 320, a steam heating module 330, a condensate recycling heating module 340, and a humidification module 350.
[0048] The surface cooling module 320 is used to cool the air; the steam heating module 330 and the condensate recycling heating module 340 are used to heat the air; and the humidification module 350 is used to humidify the air.
[0049] Temperature and humidity sensors can also be installed in the surface cooling module and the air supply module to monitor the temperature and humidity of the return air, surface cooling, air supply, and the on-site control environment in real time.
[0050] The aforementioned secondary return air valve 310 is installed on the surface cooling module 320. Specifically, the secondary return air valve 320 includes a primary return air channel and a secondary return air channel. The primary return air channel is connected to the air control device, and the secondary return air channel is connected to the air supply module 400, the steam heating module 330, or the condensate recycling heating module 340.
[0051] In one feasible embodiment, the primary return air duct can be connected to the tertiary filtration module 230 to receive filtered air.
[0052] During operation, when the secondary return air valve opens, air passing through the surface cooling module can be returned to the area before the surface cooling module, allowing the air to be recooled. Repeated operation reduces the consumption of chilled water and steam. As in the aforementioned embodiment, the secondary return air valve's secondary return air channel supply module 400, the steam heating module 330, or the condensate recycling heating module 340 are connected. Regardless of which module is connected, it can be used to receive this portion of air and return it to the area before the surface cooling module, achieving stratified utilization of the return air and thus reducing the consumption of chilled water and steam.
[0053] In this embodiment, the air conditioner monitors and controls the ambient temperature and humidity, as well as the return air temperature and humidity, in real time using temperature and humidity sensors. The controller then automatically adjusts the opening of the secondary return air valve based on the monitored temperature and humidity data, achieving stratified utilization of the return air. Subsequently, according to the control settings, the consumption of chilled water and steam is reduced while meeting temperature and humidity requirements. Finally, the system operating parameters are dynamically adjusted based on indoor environmental needs to optimize energy-saving performance.
[0054] As can be seen, the process air conditioner in this embodiment can operate according to the above-described execution flow. During operation, it uses temperature and humidity sensors to detect massive amounts of data such as temperature, humidity, and moisture content of each module (fresh air, return air, mixed air, surface cooling, and supply air). After training with this data, the trained model compares and judges the control setpoint and correction value, continuously bringing the correction value closer to the setpoint, and automatically adjusts the opening of the secondary return air valve according to a preset control strategy. For example, when the return air temperature is high, the secondary return air volume is appropriately increased to reduce the cooling load on the surface cooling module; when the return air humidity is high, the humidity utilization of the return air is optimized by adjusting the opening of the secondary return air valve. This further reduces the consumption of chilled water and steam, and reduces the amount of steam used for excessive heating caused by excessive surface cooling.
[0055] Figure 5A schematic diagram of a process air conditioning system according to an embodiment of this application is shown. Exemplarily, the process air conditioning system includes a process air conditioner and an air conditioning controller. The process air conditioner is the process air conditioner of the aforementioned embodiment, and the air conditioning controller is a controller for controlling the process air conditioner. The controller can be a remote control or a panel controller located in the central control room.
[0056] It is understood that the system in this embodiment corresponds to the process air conditioner in the above embodiment, and the options in the above embodiment are also applicable to this embodiment, so they will not be described again here.
[0057] In the several embodiments provided in this application, it should be understood that the disclosed apparatus can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate apparatus, architecture, functions, and operations according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, program module, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that, as an alternative implementation, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.
[0058] In addition, the functional modules or units in the various embodiments of this application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.
[0059] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. A process air conditioner, characterized in that, include: The wind control device, temperature and humidity control device, air supply module and PLC control unit are set in sequence; The temperature and humidity control device is equipped with a secondary return air valve, which is used to control the return air volume by stratifying the temperature and humidity. The air control device is equipped with a temperature and humidity sensor to monitor the temperature and humidity of the return air in real time. The air supply module is used for air supply; The PLC control unit is used to adjust the opening degree of the secondary return air valve.
2. The process air conditioner according to claim 1, characterized in that, The air control device includes: a fresh air mixing adjustment module and a return air module; The temperature and humidity sensor is installed on the return air module.
3. The process air conditioner according to claim 1, characterized in that, It also includes a filtration device, which is disposed between the air control device and the temperature and humidity control device.
4. The process air conditioner according to claim 3, characterized in that, The filtration device includes a primary filtration module, a secondary filtration module, and a tertiary filtration module connected in sequence.
5. The process air conditioner according to claim 1, characterized in that, The temperature and humidity control device includes: a surface cooling module, a steam heating module, a condensate recycling heating module, and a humidification module; The secondary return air valve is installed on the surface cooling module.
6. The process air conditioner according to claim 5, characterized in that, The secondary return air valve is also connected to the primary return air channel and the secondary return air channel. The primary return air channel is connected to the new mixed air adjustment module of the air control device, and the secondary return air channel is connected to the steam heating module or the condensate recycling heating module.
7. The process air conditioner according to claim 6, characterized in that, The secondary return air duct is connected to the air supply module.
8. The process air conditioner according to claim 5, characterized in that, The process air conditioner also includes a condensate recovery device, which is connected in parallel with the steam heating module to recycle high-temperature steam condensate.
9. The process air conditioner according to claim 6, characterized in that, The PLC control unit is connected to the temperature and humidity sensor and is used to receive data collected by the temperature and humidity sensor in order to adjust the opening of the secondary return air valve.
10. A process air conditioning system, characterized in that, The process air conditioner and air conditioner controller as described in any one of claims 1 to 9 are installed.